Skip to main content

Science – Society – Technology

Geothermal Energy Cover Image

Table 2 Chemical composition (mg/L) and stable-isotope and 87Sr/86Sr-composition of ground and thermal waters sampled during the field campaigns

From: Geochemical/hydrochemical evaluation of the geothermal potential of the Lamongan volcanic field (Eastern Java, Indonesia)

Sample   Ca Mg K Na Fe Li Rb Si B Cl HCO3 SO4 2− Ionic balance 18O 2H 87Sr/86Sr
WP17 Oct 2012 Spring NE 33.5 37.4 44.1 249 0.0 0.0 0.2 26.1 4.9 330 632 0.0 −19a −5.85 −31.4 n.d.
Tiris 1 June 2012 Spring E 63.9 159 49.0 273 n.d. 0.29 0.17 68 14 355 1280 23.8 −3 −5.8 −36.9 0.70464 (±3)
Tiris 2 June 2012 Spring E 93.5 227 76.5 406 n.d. 0.39 0.28 83 21 521 2100 23.1 6 −5.1 −35.5 0.70464 (±2)
Tiris 3 June 2012 Spring E 86.1 201 69.1 370 n.d. 0.35 0.26 77.6 20 465 1650 23.2 −2 −5.06 −36.9 n.d.
Tiris December 2011 Spring E 80.3 168 67.1 353 1.30 0.47 0.28 65.0 13.2 441 1340 n.d. 1 n.d. n.d. n.d.
Tiris 5 June 2012 Spring E 61.9 222 45.7 268 n.d. 0.22 0.16 70.4 14 130 1680 4.63 4 −5.28 −33.9 n.d.
Tiris 6 December 2012 Spring E 54.3 192 43.9 254 n.d. 0.3 0.2 57.8 10.3 348 1400 n.d. −3 −5.49 −36.5 n.d.
WP7 Lad June 2012 Lake 39.7 34.0 8.0 33.3 n.d. 0.0 0.0 20.4 2.0 8.1 427 15.0 −8 n.d. n.d. n.d.
WP18 June 2012 River 29.1 17.1 4.7 17.4 n.d. 0.0 0.0 32.5 0.0 11.9 323 11.0 −12 n.d. n.d. n.d.
WP 5 June 2012 Diluted and contaminated seawater 257 963 282 773 n.d. 0.0 0.2 4.2 2.0 12,800 610 2450 1 n.d. n.d. n.d.
  1. aSampling of WP17 was additionally conducted by the Indonesian project partners. Their sampling yielded similarly poor ionic balances, with the value scattering between −19 and −22. The poor quality of the ionic balance is due to anthropogenic activities of a nearby village (approximately 1 km)